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  <table align="center" border="1">

    <tr bgcolor="lightblue">
        <th>Signature</th> <th>Description</th>
    </tr>

    <tr bgcolor="lightgrey">
      <td bgcolor="maroon"> <font color="white">
        <PRE><B>
struct DataFrameError{ }
        </B></PRE></font>
      </td>
      <td>
        It is derived from <I>std::runtime_error</I>. It is the base of all DataFrame exceptions. It might be also thrown in cases where other exceptions may not be applicable.
      </td>
    </tr>

    <tr bgcolor="lightgrey">
      <td bgcolor="maroon"> <font color="white">
        <PRE><B>
struct BadRange{ }
        </B></PRE></font>
      </td>
      <td>
        It is derived from <I>DataFrameError</I>. It might be thrown in cases where the query is asking for out-of-range data. For example, when you try to access data or index column that is out of range.
      </td>
    </tr>

    <tr bgcolor="lightgrey">
      <td bgcolor="maroon"> <font color="white">
        <PRE><B>
struct ColNotFound{ }
        </B></PRE></font>
      </td>
      <td>
        It is derived from <I>DataFrameError</I>. It might be thrown in cases where the operation is asking for non-existence column.
      </td>
    </tr>

    <tr bgcolor="lightgrey">
      <td bgcolor="maroon"> <font color="white">
        <PRE><B>
struct InconsistentData{ }
        </B></PRE></font>
      </td>
      <td>
        It is derived from <I>DataFrameError</I>. It might be thrown in cases where data is inconsisten. For example, when you are trying to populate a collumn with a data vector that is longer than the index column.
      </td>
    </tr>

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      <td bgcolor="maroon"> <font color="white">
        <PRE><B>
struct NotFeasible{ }
        </B></PRE></font>
      </td>
      <td>
        It is derived from <I>DataFrameError</I>. It might be thrown in cases where the operation is not feasible. For example, asking to interpolate missing data in a string column.
      </td>
    </tr>

    <tr bgcolor="lightgrey">
      <td bgcolor="maroon"> <font color="white">
        <PRE><B>
struct NotImplemented{ }
        </B></PRE></font>
      </td>
      <td>
        It is derived from <I>DataFrameError</I>. It might be thrown in cases where the operation is not yet implemented.
      </td>
    </tr>

  </table>

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